For machines preinstalled with Windows 7, there is no One Key Recovery interface after pressing the button. See Fig.1
Re-dividing the extended partition may lead to the issue. If there are more than three extended partitions, the issue will occur. Back to factory default, there are C and D drives. You can repartition D drive into three parts: D, E, F drive. If you repartition D drive into four parts: D, E, F and G drive, OKR may fail. To resolve this issue, you must only create three logic partitions.
The label of the hidden partition must be "LENOVO_PART".
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